There are many shows that profile serial killers and the crimes they commit. What makes "Evil, I" different is that the narrative is told in the first person, narrated by the killers themselves ... sort of. Each episode possesses its own well-defined voice, which is carefully chosen to match the vocal characteristics of the killer featured in that episode, as heard in audio samples such as court recordings and interviews. Episodes also include interviews with family members involved in the cases and insight from the detectives who cracked the cases.